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Patented June 12, 1888.

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B. J. MALLETT. PRINTING TELEGRAPH.

N. FETUS, Phmwum m UNITED STATES PATENT Erich,

EDWARD J. MALLETT, OF BAY SIDE, NEl-V YORK.

PRINTING- TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 384,322, dated June 12,1888.

Application filed February 26, 1887. Renewed April 5, 18518. Serial No.269,661. (No model.)

T0 at whom it may concern;

Be it known that I, EDWARD J. MALLETT, of Bay Side, Long Island, in theState of New York, haveinvented certain new and useful Improvements inPrinting-Telegraphs, of which the following is a specification.

The instrument in which my present improvements are embodied is areceiving-instrument for use in a printing-telegraph system, andinvolves the use of two type-wheels, two press-pallets-one for eachwheeland an independent magnet for each of said pallets. The twotype'wheels are capable of shifting or sliding lengthwise on therotating shaft on which they are mounted, so that the one or the otherof them, as occasion requires, may be brought into the line on which theprinting is to be done, and their position is determined by the twopallets, one wheel or the other being in printing position, according asone or the other of the twopallets is caused to move.

One characteristic of my invention is, that the one movement of thepallet causes both the shifting of the typewheels to proper po sitionand the printing from that one which is thus brought into printingposition. The shifting is accomplished during the first part of thestroke of the pallet and the printing during the last part of the samestroke.

The shifting mechanism I prefer consists of a dog on the pallet whichacts upon the end of a shifting-lever, which has a beveled facesufficient to throw the lever to the proper extent, and above that bevela face which is parallel with the line of motion of the dog, so that thedog can move over and in contact with it without imparting furthermovementto the shiftinglever. I may use this shifting mechanism with onepallet only, employing a spring by which the typewheels will be pressedcon stantly in a direction opposite to that in which they are moved bythe shifting mechanism; but by this plan the load of the magnet for thatpallet which carries the shifting-dog is increased to an extent equal tothe power of the spring whose stress must be overcome, and I thereforeprefer to dispense with the spring andto duplicatetheshifting mechanism,employing one set with each pallet, so that the wheels will be shiftedpositively in one di rection or the other, according as one or the otherof the two pallets is called into action,

The instrument thus generally described has been devised by me with moreparticular refcrence to the needs of the system for operatingprinting-telegraphs described and claimed in my application for LettersPatent filed of even date herewith, Serial No. 228,970, said systemcontemplating, among other things, the use at the sending-station of twoindependent sets or rows of transmitting keys or needles, the one setembracing one portion of the characters of the code employed and theother set embracing the other portion of said characters, and also theuse at the receiving-station of two type-wheels bearing characterscorrespondingly arranged and two independent press magnets and pallets,one for each wheel, the arrangement being such that the keys of one setwill cause the main line to be open at the time reversals stop thereinand the keys of the other set will cause the line to be closed at thattime, the condition of the line (that is to say, whether it is open orclosed) determining which one of the two press-magnets at the v Figure lis a perspective view of so much of a printing-telegraph receiver as isneeded to illustrate my invention. Fig. 2 is a front elevation of thetype-wheels and shifting mechanism, with the press-pallets incross-section. Fig. 3 is a front elevation of the press magnets andpallets.

I have omitted the frame-work of the ma-. chine, the escapementmechanism for operating or controlling the movement of the type wheelshaft, the inking-pad, and other accessories usually found inprinting'telegraphs. Such devices are well understood, and, forming nopart of my present improvements, do not require illustration.

The parts of the machine which I have deemed it necessary to show arethe type-wheel shaft A, the two type-wheels B G, the shield D, thepress-magnets consisting of the two spools E E and intermediate nakedsoft-iron core F, all mounted on a common yoke,G, the two pivotedindependent press-pallets H H, and the hinged press-pad I, which isoperated equally by the movement of either pallet. The two type-wheelsare fastened together, so that .they move together at all times. Theyslide lengthwise 011 their shaft A, but are compelled to follow itsstep-by-step rotary movement by anyknown or suitable means-as, forinstance, by pins a, which extend from their hub into and through holesformed in collar 1), fixed to shaft A, the pins sliding back and forthin their holes as the wheels are shifted back and forth on the shaft.

The same shifting mechanism is provided for each pallet. Therefore adescription of one will answer for both. Taking, for example, pallet H,it is provided at the proper point with an upright shifting-dog, c. Inproper position to co-operate with this dog during the-upward movementof the press-pallet is a shifting lever, (Z, the upper end of which isforked, the forks being provided with points to enter and engage anannular groove, 6, in the type-wheel hub. The shiftinglever is pivotedat f to the fram'eof the machine, and upon that portion of it which isacted on first by the dogs as it rises is provided with a bevel orincline, g, of sufficient extent to cause the dog which acts thereon tothrow the shiftinglever, and consequently the type-wheels, the properdistance to bring the type-wheel B over the slot or opening in theshield D,which slot or opening is slightly wider than the typewheel.Above the incline g is the straight portion h, along which, during theconcluding portion of the movement of the pallet, the dog moves withoutimparting movement to the shifting-lever.

The two sets of shifting mechanism are so placed that one or the otherof the pivoted shifting-levers is always in position to be acted on byits appropriate dog. If two consecutive impressions are taken from onewheel-e. g., from wheel B-"-the shifting of the wheel to proper positionover the shield D will be accomplished during the first rise of palletH. The wheel then remains in its shifted position, while the palletdescends and again rises to make a second impression. In fact, when thewheels are shifted by one of the pallets they remain in that positionuntil the other pallet comes into action. It is immaterial, however,whether they shift from position during the intervals between the riseof the pallets 'or not, because either pallet when in action will duringthe first portion of its rise compel the wheels to assume the requiredposition, and will then hold them in that position during the subsequentprinting operation.

Each pallet is provided with a horizontal lifter-arm, i, which extendsunder the hinged will lift the press-pad. The pad, however, rises highenough to press the tape against the face of the type-wheel only whilethe shiftingdog is on the straight face h of the shiftinglever,which isafter the shifting of the typewheels has been accomplished.

Each press-pallet is pulled down by a spring, and is lifted by theattraction of the armature with which it is provided for the magnetappropriate to it.

The spool E and core F constitute one magnet; the spool E and the coreF'constitute the other magnet. In other words, the naked core F iscommon to the two spools. When the current is through magnet E,pallet His operated; when the current is through magnet E, pallet H is calledinto action. This particular form'of magnet is not here claimed per seby me, the same being the subject in part of my aforesaid application,Serial No. 228,970, of even date herewith.

I have described what I believe to be the best way on the whole ofcarrying my improvements into effect. I do not, however, desire to beunderstood as limiting myself to the details herei'nbet'ore described inillustration of the same, for it is manifest that the construction andarrangement of parts may be considerably varied without departure frommy invention, what is mainly essential being that the shifting of thetype-wheels (when shifting is called for) shall beaccomplished bythesame stroke of the pallet which accomplishes the printing.

What,therefore, I claim,and desire to secure by Letters Patent, is-

1. The combination of the laterally-movable type-wheel, the shiftingmechanism, theprinting-pad, and the press-pallet,which during the firstpart of its stroke completely shifts and brings to rest the movabletype-wheel and subsequently effects the printing, substantially as andfor the purposes hereinbefore set forth. v

2. The combination of the twolaterally-movable type-wheels, the shiftingmechanism, the two independent press-pallets, each of which during thefirst part of the stroke completely shifts and brings to rest themovable typewheels and subsequently effects the printing,

and the press-pad common to the two pallets,

substantially as hereinbefore set forth.

3. The combination of the two laterally-movable type-wheels, theshifting mechanism, the slotted shield, the press-pad common to bothpress-pallets, and two independent press-pallets, each of whichduring'the first part of its stroke completely shifts and brings to restthe movable type-wheels and subsequently effects the printing operation,substantially as hereinbefore set forth.

4. The combination of the two independent press palIets, thetype-wheels, and the two sets 'ofshifti'ng mechanism, one for eachpallet,the

combination being and acting substantially as hereinbefore set forth.

5. The two type-wheels, the two 'independ ent press-pallets andwheel-shifting inechanstraight face h, substantially as and for the ismoperated thereby, and the press-pad, in purposes hereinbefore set forth.1o

combination with the two magnets, one for i In testimony whereof I havehereunto set each pallet, substantially as and for the purmy hand this25th day of February, 1887. poses hereinbefore set forth. EDXVARD J.MALLETT.

6. The combination of the type-wheel, the 'presepallet, the shifting-dogthereon, and the shifting-lever provided with an incline, g,and

WVitnesses:

CHARLES TAYLOR, C. E. MYLANDER.

